Same problem, i can start a game via the fire TV but then i get a black screen only with the mouse icon, first with the windows icon then with the "in game" mouse icon (assassins creed odysee).
5700XT
Adrenalin 20.3.1
Ryzen 3600
Most recent Fire TV App (30.03.2020)
Powerline/ WLAN same Network
Anyone has a fix for this?